Balance arm for supporting working tools



FIG. 1 is a side elevational view of a balance arm for supporting working tools showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side end elevational view taken from the left of FIG. 1;

FIG. 4 is a side end elevational view taken from the right of FIG. 1;

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a balance arm for supporting working tools, as shown and described. 